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authorJan Kara <jack@suse.cz>2013-01-30 00:28:01 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2013-02-22 23:31:36 -0500
commit54c807e71d5ac59dee56c685f2b66e27cd54c475 (patch)
treee64f5cc0ae82ab8c7a990485799980ee1678f02f /fs/direct-io.c
parentda2d8455ed7eb22d7642ecee43dc463ac42a1256 (diff)
downloadop-kernel-dev-54c807e71d5ac59dee56c685f2b66e27cd54c475.zip
op-kernel-dev-54c807e71d5ac59dee56c685f2b66e27cd54c475.tar.gz
fs: Fix possible use-after-free with AIO
Running AIO is pinning inode in memory using file reference. Once AIO is completed using aio_complete(), file reference is put and inode can be freed from memory. So we have to be sure that calling aio_complete() is the last thing we do with the inode. CC: Christoph Hellwig <hch@infradead.org> CC: Jens Axboe <axboe@kernel.dk> CC: Jeff Moyer <jmoyer@redhat.com> CC: stable@vger.kernel.org Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/direct-io.c')
-rw-r--r--fs/direct-io.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c
index cf5b44b..f853263 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -261,9 +261,9 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is
dio->end_io(dio->iocb, offset, transferred,
dio->private, ret, is_async);
} else {
+ inode_dio_done(dio->inode);
if (is_async)
aio_complete(dio->iocb, ret, 0);
- inode_dio_done(dio->inode);
}
return ret;
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